Perityle tenella |
Perityle coronopifolia |
|
---|---|---|
Dixie or Springdale Rock daisy, Springdale rock-daisy |
Arizona rockdaisy, crow-foot rock daisy |
|
Habit | Perennials or subshrubs, (5–)15–30(–35) cm (stems erect to pendulous often densely leafy); usually densely short-hairy. | Subshrubs, 6–36 cm (in rock crevices, stems relatively many, erect or pendulous, very leafy); sparsely to densely grayish hairy. |
Leaves | petioles 2–8 mm; blades usually broadly deltate-ovate, sometimes subovate or subcordate, 5–18(–25) × 4–18(–20) mm, (bases truncate) margins usually ± serrate, rarely laciniate. |
petioles 2–8(–12) mm; blades pedately 3-lobed (lobes spatulate or linear), or 2–3-pinnatifid (lobes linear-filiform), 4–30 × 4–20 mm, ultimate margins entire. |
Peduncles | 4–25 mm. |
7–15 mm. |
Involucres | campanulate. |
campanulate. |
Ray florets | 0. |
8–12; corollas white, laminae broadly oblong or oblong-elliptic to subspatulate, 3–7 × 2–3 mm. |
Disc florets | 23–35(–48); corollas yellow, tubes (1–)1.2–1.6 mm, throats tubular to narrowly funnelform, 1.2–1.6(–2.2) mm, lobes 0.3–0.7 mm. |
30–40; corollas yellow, often purple tinged, tubes 0.8–1 mm, throats tubular, tubular-funnelform, or tubular-campanulate, 1–1.3 mm, lobes 0.3–0.4 mm. |
Phyllaries | 13–20, linear to narrowly or broadly lanceolate, 4–5(–6) × 0.8–1.3 mm. |
2–16, linear-lanceolate to narrow-ovate, 3.5–5 × 0.5–1.5 mm. |
Heads | borne singly or (2–10) in corymbiform arrays, 6–7 × 4–6 mm. |
(2–5) in corymbiform arrays, 5–6.5 × 5–6 mm. |
Cypselae | narrowly oblanceolate, 2.5–3.3 mm, margins obviously calloused, minutely hairy; pappi 0 or of 1(–3) moderately stout bristles 2–2.8(–4.1) mm plus callous crowns. |
linear-oblong to narrowly oblanceolate, 1.8–2.5 mm, margins usually prominently calloused, sometimes thin, usually ciliate; pappi of 2(–3+) barbellulate bristles 1.5–2.5 mm plus crowns of hyaline, laciniate scales. |
2n | = 32. |
= 34. |
Perityle tenella |
Perityle coronopifolia |
|
Phenology | Flowering spring–fall. | Flowering spring–fall. |
Habitat | Rocky slopes or crevices in limestone or sandstone rock faces | Rock and cliff faces |
Elevation | 600–2700 m (2000–8900 ft) | 1000–2600 m (3300–8500 ft) |
Distribution |
AZ; NV; UT
|
AZ; NM; Mexico (Chihuahua)
|
Discussion | Of conservation concern. Similarities of Perityle tenella to P. congesta are discussed under the latter. Perityle tenella occurs in northwestern Arizona, southeastern Nevada, and southwestern Utah. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Perityle coronopifolia is widespread in south-central and southeastern Arizona, and southwestern and south-central New Mexico. The combination of white rays, often pinnatifid leaves, and perennial habit distinguish it. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 21, p. 329. | FNA vol. 21, p. 322. |
Parent taxa | Asteraceae > tribe Heliantheae > subtribe Peritylinae > Perityle > sect. Laphamia | Asteraceae > tribe Heliantheae > subtribe Peritylinae > Perityle > sect. Perityle |
Sibling taxa | ||
Synonyms | Laphamia palmeri var. tenella, Laphamia palmeri | Laphamia coronopifolia |
Name authority | (M. E. Jones) J. F. Macbride: Contr. Gray Herb. 56: 39. (1918) | A. Gray: Smithsonian Contr. Knowl. 5(6): 82. (1853) |
Web links |